Joshua h



(No Model.)

J. H. 00X.v PaWl Shifter for Traction Engines. No. 232,88? Patented Oct.5,1880.

Wiizmwea, flaw @7 02? fimwfim y 6 4 A 54 M 4 MM m N. PEIERS,FHOTOLITNOGRAPNSR. WASNINGYON D c UNITED STATES PATENT @FFICE.

JOSHUA H. COX, OF MANSFIELD, OHIO, ASSIGNOE TO THE AULTMAN 8t TAYLORCOMPANY, OF SAME PLACE.

PAWL-SHIFTER FOR TRACTION-ENGINES.

SPECIFICATION forming part of Letters Patent No. 232,884, dated October5, 1880.

Application filed August 18, 1880. (No model.)

To all whom it may concern:

Be it known that I, JOSHUA H. COX, of Mansfield, county of Richland,State of Ohio, have invented certain new and useful Improvements inAutomatic Pawl-Shifters for Traction-Engines, of which the following isa full, clear, and exact'description, reference being had to theaccompanying dr. wings, making part of this specification, in which-Figure 1 is a rear view of one of the main ground or carrying wheels ofa traction-enine, showing my improvement applied. Fig. 2 is a sideelevation of the pawl-shifter, pawlcarrier, &c. Fig. 3 is a side view ofthe pivoted arm or stop against which the pawl shifter strikes, and Fig.4 is a top view of the same.

My invention. relates to a novel arrangement of devices forautomatically shifting the pawls which operate to drive the wheels oftraction engines, whereby the operation of reversing the movement ofsaid wheels is facilitated, as will be explained.

The machine to which my improvements are applied is similar inconstruction to that described in the patent granted to. Joseph Allonas, November 4, 1879, No. 221,266, and only so much of the engine as isnecessary to illustrate my invention is shown in the drawings or will bedescribed in the specification.

In the drawings, A is one ot'the main ground or carrying wheels, mountedloosely on the axle B, and to which wheel is rigidly connected theratchet-wheel B.

O is the bevel-wheel, which is rigidly connected to the axle, andthrough which motion is communicated from the main driving shaft of theengine to the ground or carrying wheel.

D is the pawl-carrier, rigidly connected to the bevel-wheel O, and D thepawl-shifter, these parts being constructed and operatin g in a mannersimilar to those described in the patent above referred to.

The pawl-shifter D is provided with two or more arms, E E, rigidlyconnected therewith, which serve to vibrate the pawl-shifter on thepawl-carrier for shifting the pawls and bringing either set of pawlsinto engagement.

F F are arms or brackets bolted or otherwise firmly secured to thespokes of the ground or carrying wheel, and F are arms formingextensions of the arms F, and which are pivoted thereto in such manneras to be turned down out of the way of the arms E when it is desired tohold the pawls out of engagement with the ratchet-wheel B. These arms Fare provided with heel-extensions f, bent at right angles to their mainportion, which, in connection with a spring, f, serves to hold the armsin position when the arms are turned out for acting on the pawl-arm.

The arms F and F are arranged at such a distance apart on theground-wheel that the arms E shall not come in contact therewith forthrowing the pawls into engagement with the ratchet-wheels in reversingor starting the engine forward until the main driving-shaft of theengine has made three or more revolutions, so that the engine shall beunder good headway before the ground-wheels are connected with thedriving-shaft to propel the en gine over the road.

When it is desired to draw the engine over the road by means of animalpower, not using the power of the engine, the arms F are turned down outof the path of the arms E, and consequently the pawls are held out ofengagement with the ratchet-wheel but as soon as it is desired to usethe power of the engine to propel it, then the arms F are thrown out,when the arms E, coming in contact there with, force the pawls intoengagement, and the power of the engine is exerted to drive or propelthe machine over the ground.

The arms F may bepivoted directly to the spokes of the carrying-wheel,and the arms or brackets F be dispensed with.

It will be seen that modifications in the 10= cation and arrangement ofthe parts may be made without departing from the spirit of my invention.

Having now described my invention, I claim-- 1. In a traction-engine,the reversely arfor actuating the same hinged to the tractionrangedpawls pivoted to the pawl-carrier in Wheels, substantially and for thepurpose de- 10 combination with the pawl shifter, antoinatiscribed.

cally operated by means of stops on the trac- JOSHUA H. COX.tion-wheels, for reversing the pawls when the Witnesses:

engine is reversed, substantially as described. HUNTINGTON BROWN,

2. The pawl-shifter provided with rigid m J. E. BBOWN, dial arms, incombination with arms or stops HENRY D. OULLER.

